[R] help with string split in R

arun smartpink111 at yahoo.com
Tue Jun 18 06:25:13 CEST 2013

#[1] "afg3"  "alg12" "dbp3"  "elp4"  "fob1"  "gpr1" 

----- Original Message -----
From: CompBiol ATL <alongway at gmail.com>
To: r-help at r-project.org
Cc: Hong Qin <qinstat at gmail.com>
Sent: Monday, June 17, 2013 6:52 PM
Subject: [R] help with string split in R

#I want to remove '_alpha' in a vector of strings
myInput = c( "afg3_alpha", "alg12_alpha", "dbp3_alpha",  "elp4_alpha",
"fob1_alpha",  "gpr1_alpha")

#my current solution
tmpsplit = strsplit(myInput, '_')
tmp = NA
for (item in tmpsplit){
  tmp = c(tmp, item[1])
results1  = tmp[-1];
#this is what I need, but I want a better solution.

#Here is what I come up with, but it is pretty awkward
tmp3 = lapply(myInput, FUN=function(x){strsplit(x, '_')[[1]][1]})
results2 = unlist(tmp3)

#Please help me revise the above loop. Thanks, -- Hong

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